Thumb2 parsing and encoding for IT blocks.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138773 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp
index 03104f0..dd8cbe4 100644
--- a/lib/CodeGen/MachineInstr.cpp
+++ b/lib/CodeGen/MachineInstr.cpp
@@ -942,6 +942,10 @@
/// operand list that is used to represent the predicate. It returns -1 if
/// none is found.
int MachineInstr::findFirstPredOperandIdx() const {
+ // Don't call MCID.findFirstPredOperandIdx() because this variant
+ // is sometimes called on an instruction that's not yet complete, and
+ // so the number of operands is less than the MCID indicates. In
+ // particular, the PTX target does this.
const MCInstrDesc &MCID = getDesc();
if (MCID.isPredicable()) {
for (unsigned i = 0, e = getNumOperands(); i != e; ++i)